/muy"kreuh kluyn'/ , n.
a mineral of the feldspar group, potassium aluminum silicate, KAlSi 3 O 8 , identical in composition with orthoclase but having triclinic instead of monoclinic crystals, used in making porcelain.
[ 1840-50; MICRO- + -cline klínein to LEAN 1 , referring to the angles between its cleavage planes, which differ slightly from 90° ]